/*
 * Copyright 2016 Azavea
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package geotrellis.raster.mapalgebra.local

import geotrellis.raster._

/**
  * Operation to get the Cosine of values.
  *
  * @note Always returns a double or float raster.
  */
object Cos extends Serializable {
  def apply(r: Tile): Tile =
    (if(r.cellType.isFloatingPoint) r
     else r.convert(DoubleConstantNoDataCellType))
     .mapDouble(z => math.cos(z))
}
